Improvement in grain-binders



W. R. BAKER.

GRAIN-BINDER.

Patented Jan.11,1876.

N. PETERS. PHOTDLH'HOGRAPHER, WASHINGTON. n. 0.

UNITED STATES PATENT OEEIoE.

WILLIAM' R. BAKER, OF oEIoAeo, ILLINOIS, ASSIGNOR TO 0. H. AND L. J.

MCCORMICK, OF SAME PLACE.

IMPROVEMENT IN GRAIN-BIND ERSJ Specification forming part of Letters Patent No. 171,972, dated January 11, 187 6 application filed November 12, 1875.

"To all whom it may concern working together to twist the wire, but having a differential movement to cut the same.

- The object of my invention is to secure the steady working of the pinions. To this end my improvement consists in constructing the twister of two pinions revolving close together around a common axis, with anannular groove at their point of contact with each other, in which groove fits a fixed plate forming part of the binding-head, and constituting abearing for the points of the teeth of the I unions and leavim a s )308 between the inner edge of the plate and the center of the pinions, through which the wirestravel during the operation of twisting.

In the accompanying drawings, Figure 1 represents a plan view of a portion of the mech anism of the well-known.Withington binder; Fig. 2, a plan viewof the twister-pinions and their interposed plate, the face-plate of the binding-head being removed; Fig. 3, avertical section through the binder-head on the line at a: of Fig. 1.

. The binding mechanism herein "shown is fully described in an application for Letters Patent of theUnited States, filed .March 5,

1874, by Charles B. Withington, and also in an application for LettersPatent fora fixed 7 stop in connect-ion therewith, by Robert Hall McCormick, filed simultaneously herewith and as my invention relates to the twisterpinions'and their supporting-plate, 1 shall confine my description to those features.

The pinions A A are shown as mounted on a common pivot, a, with their teeth deeply indented. The pinions are capable of turning either together or independently of each other,

but work in close contact, except on their peripheries, where an annular groove, 0, is formed at'their point of junction for the reception of a plate, C, firmly secured in a v binding-head, and slitted in conformity therewith to permit of the passage of the wire to the pinions.v The points of the teethot' the pin-ions work in slots or spaces between the upper and lower covers of the binding-head and this plate, which plate forms a bearing for the pinion, thus affording a support at that point, while a space is left between the center of thepinion and the inner edges of these inclosing-plates through which the wire passes while being twisted. The coveringplates keep out dirt,&c., and serve as guides for the wire in entering the twister.

1 claim as of 1ny il1vention- The combination of thetwister-pinions and I their fixed supportingplate insertedin an annular groove therein, substantially as hereinbefore set forth. I

In testimony whereof I have hereuntosubscribed my name. p

y WM. R. BAKER. Witnesses:

J OHN V. A. HASBROOK, E. G. DAVIDSON. 

